Ladder



Aug. 18, 1925. 1,550,356

l J. HARVARD ET A l.

LADDER Filed Aug. 23, 19273 2 Sheets-Sheet 1 mmm Aug. 18, 1925. 1,550,356

J. HARVARD ET AL LADDER Filed Aug. 23, 1923 2 Sheets-Sheet 2 Patented Aug. 18, 1925.

UNITED STATES PATENT OFFICE.

JACK HARVARD AND LAWRENCE JAMES, OF VISALIA, CALIFORNIA, ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, OF ONE-HALF TO SAID JACK HARVARD AND ONE-HALF TO OLIVE KRIDLER, O'F MONTEREY, CALIFORNIA.

LADDER.

Application filed August 23, 1923.

To all whom it may concern.'

Be it known that We, JACK HARVARD and LAWRENCE JAMES, citizensl of the United States, residing at Visalia, in the county of Tulare and State of California, have invented certain new and useful Improvements in Ladders, of which the following is a specilication.

Our invention is an improved folding ladder. n

The object of our invention is to provide a ladder which inay be folded into a-Ivcry compact biuidle, and which may be unfolded into a rigid structure.

Other advantages and objects will be more specifically pointed out in the following detailed description.

In the annexed drawing in ,which our iiivention is illustrated:

Figure 1 is a front View of our ladder in the unfolded position.

Figure 2 is a front view of our ladder in the folded position.

Figure 3 is a side view of the ladder unfolded.

Figure fl is a sectional View taken on the line 4.-4 of Figure 3.

Figure 5 is a sectional view taken on the line 5 5 of Figure 4.

Referring incre particularly to the drawing, our ladder comprises a pair of standards 1 and 2, which are suitably braced in the unfolded position by braces 3 and il, pivoted at their upper ends to the standards 1 and 2 and having slots in their lower ends to perinit folding.

Legs 5 and 6 are pivoted at their upper ends to straps 7 and 8 respectively which are secured to the standards 1 and 2 respectively.

These legs are hinged together at their lower ends by a hinge 9.

A plurality of steps 10 are mounted between the standards 1 and 2. The steps consist of a pair of blocks 11 and 12, Which are Serial No. 658,900.

A vertical link 15 is pivoted to each of the blocks 12 of the steps 10, and a .spring 16 is secured to the lower end of said link and to a bracket 17 on the standard 2. This spring tends to hold the steps .in the unfolded position and prevents the untimely folding of the ladder; it also assists in unfolding the ladder, tending to swing the steps downwardly.

Having described our invention we claiin:

1. A folding ladder comprising a pair of standards, steps between said standards, said steps comprising a pair of blocks, hinged together, and to said standards. anda plate secured to one of said blocks and adapted to bear against the other, a link pivoted to one block of each step, and a tension spring;- to hold the steps in unfolded position sccui'et to said link and to one of said standards,

la pair of crossed braces, each pivoted one end to a standard, and having a slot foi'ined in the other end, and a pin in the other standard extending through the slot.

2. A folding ladder con'iprising a pair of standards, steps hinged to said standards, a link pivoted to said steps, and a tension spring to hold the steps in unfolded position secured to said link and to one of said standw ards, legs pivoted to each ofsaid standards,

and hinged together at their'lower ends.

In testiinony whereof we ai'iix our signatures.

JACK i-ninviinn. LAWRENCE JAMES. 

